JP2011521679A5

JP2011521679A5 -

Info

Publication number: JP2011521679A5
Application number: JP2011509543A
Authority: JP
Filing date: 2009-04-29
Publication date: 2012-11-08

Claims

An outer member having a proximal end and a distal end, forming a lumen extending between the proximal and distal ends, the distal end is coupled to the cryo-ablation device,
A first having at least a portion located within the lumen of the outer member and having a coolant delivery lumen in communication with the ablation device to deliver liquid coolant to the cryoablation device to remove tissue; The inner tube,
The liquid coolant formed by vaporizing the liquid coolant discharged from the second inner tube flows through the lumen of the outer member and is conveyed by the first inner tube. to cool and comprises a second inner tube having an open tip which terminates in the lumen of the outer member,
The first inner tube and the second inner tube are gaseous coolants in which the liquid coolant flowing in the first inner tube flows in the first direction and flows in the lumen of the outer member. An apparatus for cooling coolant delivered to a cryoablation instrument configured to flow in a second direction opposite the first direction .

A direction in which the first direction toward the tip of the outer member, apparatus of claim 1, wherein the second direction is a direction toward the proximal end of the outer member.

3. An apparatus according to claim 1 or 2 , wherein the outer member forms an outlet, and gaseous coolant is discharged from the lumen of the outer member via the outlet.

The apparatus of claim 3 , wherein the outlet is formed through the proximal end of the outer member.

The second inner tube extends through most of the lumen of the outer member, the tip of the second inner tube is proximate to the tip of the outer member, and the first inner tube extends completely through the outer member. Apparatus according to any one of claims 1 to 4 .

A third inner tube extending through the lumen of the outer member, the third tube connected to the cryoablation instrument so that spent coolant can be discharged from the cryoablation instrument via the third inner tube; 6. The device according to any one of claims 1 to 5 .

A cryoablation device that removes tissue at cryogenic temperatures;
A refrigeration ablation system comprising: a liquid coolant that is in communication with the refrigeration ablation instrument and that is cooled to the refrigeration ablation instrument and includes the conduit according to claim 1.

The system of claim 7 , wherein the cryoablation device comprises a cryogenic balloon catheter.

The system according to claim 7 or 8 , comprising a temperature sensor disposed in the outer member.

A third inner tube extending through the lumen of the outer member, wherein the third tube is coupled to the cryoablation device such that spent coolant is expelled from the cryoablation device via the third tube; The system according to any one of claims 7 to 9 .

The first inner tube and the second inner tube have a liquid coolant flowing in the first inner tube flowing in the first direction, and a gaseous coolant flowing in the lumen of the outer member is the first inner tube. 11. A system according to any one of claims 7 to 10 , configured and arranged to flow in a second direction different from the one direction.

12. A system according to any one of claims 7 to 11 , wherein the outer member forms an outlet and gaseous coolant is discharged from the outer member via the outlet.